I don’t like to sleep in near pitch black rooms. It just feels unnatural to me. It may be more the fact that it prevents the gradual transition to daylight unless you’re using an artificial light, so that bothers me more because you don’t know when morning is. But even when traveling I love to keep the curtains open through the night and sleep to whatever the natural light level is around me even if it’s in the middle of a city.
I work nights and sleep during the day, so I have the exact opposite of this and I also have photophobia. I have cardboard that has silver mylar glued to it taped into the windows of my bed room as well as blackout curtains and then regular curtains over those and strips of foam around the bottom of the door so no light can come in from the rest of the house. This works great in the winter but in the summer the bedroom fuckin cooks so I have to have an ac window unit in and that let’s in a lot of light so I have to wear a sleep mask in the summers. It sucks.